Air-compressor



S. A. JOHNSON.

AIR COMPRESSOR.

APPLICATION FILED AUG.1|19I9.

1,350,159. Patented Aug- 17,1920.

2 SHEETS-SHEET l.

WITNESSES: IN I/EN TOR aim ' ATTORNEY SVEN a. Jonnso v, OF'BROOKLYN, NEW YORK.

AIR-COMPRESSOR. I

Speciflcation of Letters Patent.

Application filed August 1; 1919. Serial No. 314,713.

To all whom it may concern Be it known that I, SVEN A. JOHNSON, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Air-Compressors, of which the following is a specification.

This invention has relation to air compressors and has for an object to provide a compressor of the rotary type designed to eliminate friction to the greatest possible extent, to simplify the construction, and to provide for a plurality of compression impulses during each revolution of the rotor, in a manner to be hereinafter described.

Another object of the invention is to provide an air compressor having the characteristics above set forth which includes a casing, and a rotor adapted to travel therein in an extensive path, with abutment pivotally'ar ranged around the casing and adapted to operate in members secured in the rotor whereby to secure a plurality of compressions between adjacent abutment during each revolution of the rotor.

Another object of the invention is to provide a device of the character above set forth which may be utilized not only as an air compressor, but also'as a vacuum pump according to the point of connection of the intake and delivery and also as a prime mover when air or steam is admitted thereto under pressure.

In addition to the foregoing, this invention' comprehends improvements in the details of construction and arrangement of parts, to be hereinafter described and particularly set forth in theappended claims.

In the accompanying drawings in which similar and corresponding parts are designated by the same characters of reference throughout the several views in which they appear,

Figure 1 is a View in section taken on the line 1-1 of Fig. 2, and

Fig. 2 is a central section taken transversely and vertically through the foregoing figure.

The casing of my improved air com ressor is of a compound structure, and inclu es end plates 10 and 11 mounted upon base plates 12 and arranged in spaced relation, the plate abutting to dispose the plates 10 and 11 in proper relation. A pair of annular members or casings 13 and 14 are dlsposedibetween the plates 10 and 11 and located bemounted on each eccentric is tween said casings. is a division late 15. The plates 10 and,1l are formed wit central apertures to receive a shaft 16 which passes centrally through the casings 13 and 14 and through a central opening in the plate l5 as shown. 'Each casing 13 with a channel 17 which extends very nearly throughout the entire circumference of the Y casing and communicates with a' port 18 at nular channel 22, and said channels com municate with transverse openin s, suitably capped to receive couplings 23. the shaft within each casing is an eccentric 24, the eccentrics being arranged relatively in opposed relation as shown in Fig. 2, and

cated at 25. Each rotor is cylindrical in form, somewhat smaller than the internal diameter of the casing in which it is located, and of an open work construction to reduce weight as much as possible. Each rotor is furthermore formed at 4 or more points with relatively large transverse openings or recesses 26, suitabl machined to receive oscillating cylindrica members 27, each member being formed with a transverse diametrically extending recess 28 extending very nearly through the entire diameter of the member.

As stated, the rotor is of an open work con-' struction to provide recesses or cavities 29 therein, and said cavities communicate with the interior of the recess 26 through the medium of passages 30. Each oscillating member 27 is furthermore provided with a pair of passages 31 which communicate the interior' of the recess 28 with the exterior of the member as shown. are provided, in the present instance four being shown, each abutment consisting of a plate 32 adapted to snugly fit the recess 28 of one of the members 27 and an enlarged cylindrical portion 33 at one edge to snugly fit within a cavity 34 formed in the wall of the casing. Each plate 32 is furthermore formed with a longitudinal extending pas- Patented Aug. 17, 1920,

and 14 is formed ounted on a rotor indi-' A plurality of abutments ward. If desired ing may be apertured at points opposite the there is very little friction cated at that point to open inward.

sage 35 which extends from one ed e of the plate to the opposite ed e bearing t e cylindrical portion 33 and e ect an exit as at 36 at one side of the plate, a valve 37 being 10- It will thus be seen that owin to the provision of the abutment a plura 1ty of chambers are provided between the abutment defined by said abutment, the casing wall and the rotor, the chambers varying in capacity according to the position of the rotor within the casing. A plurality of passages 38 are provided communicating between each of the chambers above mentioned and the annular passage 17 of each casing, and each passage 38 is provided with a valve 39 designed to open outthe outer wall of the easpassages 38 and normally closed by means of plates 40 whereby said plates may be removed to gain access to the valve 39.

During operation of the machine if it is desired to employ the same as a compressor the shaft is rotated in the direction of the arrow shown in Fig. l in which event the intake will be through the couplings 23. During rotation of the rotor the chambers between the abutment will be consecutively enlarged in capacity and during the period of enlargement the intake will be through the coupling 23 as mentioned, the annular channel 22 into the recess 29, passages 30 and 31, passage 35 and into the chamber through the valve opening 36. As each chamber reaches its maximum capacity and becomes subsequently reduced the air contained therein is discharged through the valve 39 and into the channel 17 from which to effect an'exit through he port 18 to a reservoir or ani; place designed to receive the air.

rom the foregoing it will be seen that because of the free movement of the sliding surfaces of the abutment and the rotor and hence this machine may be operated with maximum efiiciency. Conversely, by introducing air or steam under pressure into the couplings 23 the device may be operated as a prime mover to drive machinery. Other uses and advantages will readily occur to those skilled in the art to which this invention appertains' \Vhile I have illustrated and described my invention with some degree of particularity, I realize that in practice various alterations therein may be made. I therefore reserve the right and privilege of changing the form of the details of construction or otherwise altering the arrangement of the correlated parts without departing from the spirit of the invention or the scope of the appended claims.

I Having thus described any invention, what I claim as new and desire to secure by United States Letters Patent is:

- 1. An air compressor including a casing, and having inlet and outlet, a rotor mounted therein, a plurality of abutments having assages therethrough oscillatabl mounted in the casing and adapted to slida 1y engage the rotor, and valves in said abutments.

2. An air compressor including a casing having inlet and outlet, valves controllin the outlets of the casing, a rotor mounted within the casing, a plurality of abutments having passages therethrough mounted in the casing to slidably engage the rotor, and valves for controlling the inlet are in said abutment.

3. An air compressor including a casin having inlet and outlet, a rotor mounte for movement in the casing in an eccentric path, a plurality of members rotatably mounted in said rotor, and a plurality of abutments having passages therethrough slidably engaging said rotatable member and oscillatably mounted in the casing.

4. An air com ressor including a casing having inlets an outlets, a rotor mounted in the casing for movement in an eccentric path, a plurality of cylindrical members transversely slotted and rotatably mounted in said rotor, a plurality of abutments having passages therethrough slidably engaging the slot of the rotatable members and oscillatably mounted in the casing, and valves in said abutment for controlling the inlet.

5. An air compressor including a casing having inlets and outlets, a shaft mounted therein, an eccentric mounted on the shaft, a rotor mounted on said eccentric to travel within the casing in an eccentric path, a plurality of members rotatably mounted in said rotorand having transverse slots, a plurality of abutments having passages extending therethrough, oscillatably mounted in the casing and slidably engaging the slots of the members, valves controlling the outlet of the casing, and valves in said abutments controlling the passages therethrough.

In testimony whereof I afiix my signature in presence of two witnesses.

- SVEN A. JOHN SON. [L.S.] Witnesses:

GUSTAVE BERGGSEN, A. S. STEEN.

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